AT&T’s New Data Plans Explained

— The current plan provides unlimited data usage for $30 per month. If you’re a current customer, you can keep it.

— A new plan called DataPlus will provide 200 megabytes of data for $15 per month. If you go over, you pay another $15 for 200 megabytes. AT&T says this plan will suffice for people who surf the Web, send e-mail and use applications like Facebook. The data allowance is enough for 1,000 e-mails without attachments, or 400 Web pages, but only 20 minutes of streaming video.

— A plan called DataPro will provide 2 gigabytes of data per month (10 times more than DataPlus) for $25 per month. If you go over, you pay another $10 for 1 gigabyte. AT&T says 98 percent of smart phone users use less than 2 gigabytes, which is the equivalent of more than three hours of streaming video.

The prices are in addition to the voice part of the plan, which costs at least $40 per month, plus taxes and fees that vary by jurisidiction. Data use over Wi-Fi does not count towards the limits.